56509705 has 16 divisors (see below), whose sum is σ = 81578880. Its totient is φ = 36709632.

The previous prime is 56509657. The next prime is 56509711. The reversal of 56509705 is 50790565.

It is a cyclic number.

It is not a de Polignac number, because 56509705 - 2²³ = 48121097 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41824 + ... + 43153.

It is an arithmetic number, because the mean of its divisors is an integer number (5098680).

Almost surely, 2^56509705 is an apocalyptic number.

It is an amenable number.

56509705 is a deficient number, since it is larger than the sum of its proper divisors (25069175).

56509705 is a wasteful number, since it uses less digits than its factorization.

56509705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85008.

The product of its (nonzero) digits is 47250, while the sum is 37.

The square root of 56509705 is about 7517.2937284637. The cubic root of 56509705 is about 383.7434832862.

The spelling of 56509705 in words is "fifty-six million, five hundred nine thousand, seven hundred five".